HD 112300 b
HD 112300 b is a exoplanet orbiting the M1 III star HD 112300 in the constellation Virgo. It lies about 203 light-years from Earth and was discovered in 2023 using the radial velocity method.
Is HD 112300 b in the Habitable Zone?
HD 112300 b orbits inside the inner edge of the habitable zone of HD 112300. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of HD 112300: 18.297–47.112 AU (conservative: 23.176–44.666 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
See the full interactive habitable-zone view in the Exoplanet Explorer app ›
Orbit and Year Length
A year on HD 112300 b — one full orbit around HD 112300 — lasts 466.6 Earth days, longer than an Earth year. It orbits at an average distance of 1.330 AU. Its orbit is highly elliptical (eccentricity 0.36), swinging dramatically closer to and farther from its star.
How Was HD 112300 b Discovered?
HD 112300 b was discovered in 2023 using the radial velocity method, with observations from Bohyunsan Optical Astronomical Observatory.
The radial velocity method measures the subtle wobble of a star caused by the gravitational pull of an orbiting planet, visible as periodic shifts in the star's light spectrum. The size of the wobble reveals the planet's minimum mass.
How Far Away Is HD 112300 b?
HD 112300 b is 202.5 light-years (62.1 parsecs) from Earth. Light arriving here tonight left the planet around the year 1824. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 3,564,000 years to make the journey.
Earth Similarity Index
The Earth Similarity Index (ESI) scores how physically similar a planet is to Earth, from 0 to 1, based on radius, density, escape velocity and surface temperature. HD 112300 b scores 0.08, ranking #4,761 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HD 112300
HD 112300
- Spectral type
- M1 III
- Surface temperature
- 3,657 K (Sun: 5,772 K)
- Mass
- 1.40 M☉
- Radius
- 65.80 R☉
- Luminosity
- 502.5856 L☉
Planetary System
HD 112300 b is the only planet known to orbit HD 112300 so far.
HD 112300 b — Complete Data
| Mass (best estimate) | 5,031.22 Earth masses |
|---|---|
| Orbital period | 466.63 days |
| Orbital distance | 1.330 AU |
| Eccentricity | 0.360 |
| Earth Similarity Index | 0.08 |
| Distance from Earth | 202.5 light-years (62.1 parsecs) |
| Constellation | Virgo |
| Discovery method | Radial Velocity |
| Discovery facility | Bohyunsan Optical Astronomical Observatory |
| Discovery year | 2023 |
Data: NASA Exoplanet Archive, last updated 2023-08-07. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HD 112300 b
Is HD 112300 b habitable?
No — HD 112300 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is HD 112300 b?
HD 112300 b is about 203 light-years from Earth in the constellation Virgo. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 3,564,000 years to get there.
How long is a year on HD 112300 b?
One orbit around HD 112300 takes 466.6 Earth days.
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